Safety pipe-grip.



F.'B. GIST.

SAFETY PIPE GRIP.

APPLICATION FILED FEB. 10. I914.

1,1 90,1 46. Patented July 4, 1916.

-Llll FEL'I'A B. GIST, OF BBOWNFIELD, TEXAS.

SAFETY PIPE-GRIP.

Specification of Letters Patent.

PatentedJuly a, 1916.

Application filed February 10, 1914. Serial No. 817,883.

To all whom it may concern:

Be it known that I, FuL'rA B. Gis'r, a citizen of the United States,residing at Brownfield, in the county of Terry and Stateof Texas, haveinvented new and useful Improvements in Safety Pipe-Grips, of which thefollowing is a specification.

The present invention relates to devices for gripping tubes orcylinders'to hold the same against movement in .one direction, and ismore particularly devised for use in connection with well drilling orsinking operations, and the improvement resides in the construction,combination and operative arrangement of parts set forth in thefollowing specification and falling within the scope of the appendedclaim.

In the drawing: Figure 1 is a perspective view of the improvement, Fig.2 is a top plan view of the same, Fig. 3 is a sectional viewapproximately on the line 3-3 of Fig. 2, and Fig. 4 is a transversesection on the line 14 of Fig. 2.

In carrying out my invention I provide two base sections 1 and 2respectively, both of a similar construction andboth being provided,adjacent their outer edges, with registering openings arranged in pairs,one above the other. By adjusting the nut 1, the companion sections 1and 2 may be moved toward or away from each other as occasion requiresand by providing each of the ends of the base members with two bolts 3,the same are connected without danger of lateral movement of one of saidmembers with relation to the other. The wing nut4 is adapted to engagethe bolts 3 in a well known manner. Each of'the base members has itsinner or opposite face centrally provided with a rounded depression 5,and each of the members has centrally secured upon its upper face, ablock 6. These blocks have their lowerinner or adjacent faces depressedto provide the upper inner faces with lips 7 which are curved inwardlyor are centrally concaved. The blocks have their upper faces, adjacenttheir longitudinal edges formed with vertically disposed ears 8 and 9respectively, the said ears being of a length almost equaling the widthof the block upon which it is formed, and the spaced ears are providedwith a plurality of registering openings 10, and passing through two ofsaid openings in each of the pairs of ears is a pintle in the nature ofa bolt 11, the said bolt being sustained upon the ears through themedium of nuts 19.. Arranged between'each pair of ears upon' each of theblocks is a gripping jaw, the jaw upon the block arranged upon the base1 being designated by the numeral 13, while the second jaw upon the basesection :2 is designated by the numeral 14; Each of the jaws is of awidth equaling the space between the ears to which it is connected, theinner faces of the ears providing abutment walls which, engaging withthe opposite sides of the jaws, prevent a lateral movement of the jaws.The jaw 13 has its end, below its pivot 11, arranged angularly of itslongitudinal plane, as indicated by the numeral 15, and the said angularend is adapted to abut with the block 13 to limit the outward movementof thesaid jaw upon the block 7 Each of the jaws has its upper edgeprovided with a substantially V-shaped mouth 16, the opposite walls ofthe mouths being formed with diagonally disposed teeth 17.

The jaw 14: has its lower pivoted end rounded so that the rotarymovement of the same is not restricted by the block 6,

said rounded end being arranged out of the path of contact with the saidblocks, and arranged between the said rounded end of the jaw 14 and theblock 6 is the curved end of a flat spring 18, the opposite end of saidspring bearing against the rear face of the jaw 14 to swing the said jawtoward the jaw 13.

In the application of my device, the base sections 1 and 2 are movedaway from each other upon the bolts 3 a sufficient distance to permit oftheir rounded depressions 5 being received upon the opposite sides ofthe well casing, the lips 7 also engaging the said casing. The nuts 4are then adjusted so that the base of the block members 1 and 2 arebrought and held in tight frictional engagement with the casing.Suitable mechanism is provided for engaging the well tube to withdrawthe same from the casing, the

space between the lip 7 being suflicient to permit of the free operationof the said tube, which is shown in Fig. 3 of the drawing, and indicatedby the numeral 50. The jaws 13 and 14: have their substantially V-shapedengaging faces which are provided with teeth 17 gripping upon theopposite sides of the pipe or tube 50 to permit of the said tube beingdrawn in an upward direction without danger of the same slippingdownwardly within the casing when a fresh grip is obtained by thelifting mechanism (not shown).

WVhen it is desired in inserting the pipe within the casing to attach anadditional length of pipe, the jaws 13 and 14 are brought to engage andto securely hold against rotation the lower section of the pipe, or thepipe which is already partly inserted Within the casing. The secondlength of pipe may be then easily and quickly screwed to the firstmentioned length and this process may be repeated until all of thesections are connected, it being understood that the'jaws are swung outof engagement with the sections of pipe to be lowered within the casinguntil the said sections are sufficiently lowered to receive anadditional pipe section.

1 From the above description, taken in connection with the accompanyingdrawing, the simplicity of the device as well as the advantages thereofwill, it is thought, be perfectly apparent to those skilled in the artto which such invention appertains without further detailed description.

Having thus described the invention, what I claim is:

In a device of the class described, in combination, a pair of blocks, apair of ears integrally disposed upon each of said blocks substantiallythroughout their width, said pair of blocks being formed with alongitudinal spaced apart series of openings in registration, a pair ofgripping jaws, pivots connecting each pair of said ears and adapted forinsertion in any of said openings, said jaws being fulcrumed upon saidpivots, one of said gripping jaws being formed adjacent said blocks withan inwardly beveled edge disposed contiguous to said block, each of saidjaws being formed at its outer gripping end with an outwardly beveledtransverse V-shaped edge, said V-shaped edges being formed withoppositely sloping teeth, another of said gripping jaws being i ormedadjacent said block with an areuate edge, a flat spring bearing flatupon one of said blocks and se cured thereto, said spring being curvedunder and around the arcuate edge of said gripping jaw and having aterminal ar ranged to press against said jaw to hold it biased, saidother gripping jaw arranged at a bias to contact said remaining grippingjaw.

In testimony whereof I aiiiX my signature in presence of two witnesses.

FELTA B. GIST. WVitnesses M. D. WILLIAMS, J. T. MAY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D; C.

